Pressure-increaser.



E. E'. LLOYD.

PRESSURE INCREASER. APPLIGAToN FILED JAN.3 1,1910.

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wuawbofo ERNEST? Llmm 'ERNEST r. LLoYD, or DETROIT, MICHIGAN..

PRESSURE-INCREASER.

Specication of Letters Patent.

Patented Jan. 16, 1912.

Application led January 31, 1910. Serial No. 540,945.

To all whom t may concern:

Be it known that I, ERNEST F. LLoYD, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invent-ed certain new and useful Improvements in Pressure-Increasers, of which the following is a specification, reference being vhad therein to the accompanying drawings.

This invention relates to a pressure increaser ormeans automatically controlling the flow of gas orthe like through' a main or conduit whereby the pressure at a given point in the main is built up as the volume of gas passing the point increases.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a View,

largely diagrammatic, of an apparatus embodying features of the invention; and Figs. 2 and 3 are views in detail of modifications of parts thereof.

Referring to the drawings, a main or conduit has an automatic regulating valve 1 that controls the flow from 'the inlet arm 2 of the main to the outlet arm 3 thereof, arranged to hold the pressure in the outlet arm 3 at a constant point/in relation to atmospheric pressure. The pressure in the inlet arm 2 is greater than that in the outlet 3.

In preferred form the regulating valve has closures 4 operatively connected by a stem 5 to a main diaphragm 6 that divides a pressure drum 7 into an upper and lower compartment. f The effective area of the upper side of the diaphragm is balanced in part by a countervailing diaphragm 9 vand any preferred form of counterbalancing device indicated a 10 is used to take care of the weight of t e parts. A pressure pipe 11 from the inlet 2 has an upper branch 12 one arm of which opens into the upper compartment of the drum 7 and the other arm into one chamber of a master valve casing 13. A restriction in the form of an `apertured diaphragm 14 or the like impedes the How into the branch 12. A lower branch 15 from the pressure ipe 11 opens into the lower compartment oip the drum 7 and into, a second chamber in the casing 13, a second restriction 33 being placed in thesaid branch.

Closures 16 in the master valve casing are moved by a stem 17 and diaphragm 18 in a drum 19. The casing is in communication with the outlet through a 'discharge pipe'20 and the diaphragm 18 whose upper slde 1s exposed to atmospheric pressure rises and falls in response to fluctuations in pressure in the 'outlet arm 3 so that when the pressure increases the main diaphragm 6 is ralsed by the increased pressure in the lower part of the drum 7 due to the cutting 0H of the outlet of the lower branch 15, thereby partially closing the regulating valve. Opposltev conditions produce opposite results in a familiar manner so that the pressure in the outlet arm 3 is practically constant.

It will be understood that the closures of the master valve are weighted as indicated at 32 and the amount of this weight determines the range of action of the governor.

In order that the regulator may allow the pressure to increase as the volume of gas passing the loutlet increases, means are employed to cause a drop in pressure in the outlet arm as by a valve 21 which may be opened and closed by an operator. A loading drum 22 is mounted on the drum 19 and is divided into two closed compartments by a loading diaphragm 24 or like movable member that is operatively connected to the stem 17. The upper compartment of the drum is connected by a pipe 25 to the outlet ,arm 3 on t-he pressure side of the valve 21 either directly as' indicated in Fig. 3, or through the intake armV of a Venturi tube 26 inserted as by a by-pass around the valve 21. A second pipe 27 leads from the lower compartment of the drum 23 either directly into the outlet 3 on the exhaust side of the valve 21 or into the throat of the Venturi tube 26 as in Fig. 1. 'The Venturi tube may be replaced by a Pitoty tube 28 as indicated in Fig; 2 with means shown diagrammatically at 29 for increasing the efect of the velocity of flow. If the Pitot or Venturi tubes are not used the diaphragm 24 must be of a very large area in order to be suitably affected by the dii'erences in pressure set up by the valve 21. To avoid this undesirablel construction, the Pitot tube or Venturi is used, the latter espeeiall multiplying the effect Yof the dii'erenti pressure lseveral times after the' well known law of iow therethrough. By this arrangement of parts an increase in How through the outlet arm ffor causing a local dro 3, lwhich means' an increase of volume of gas passing the pipe 20, causes increasev in differences in pressurearound the valve 21, the latter havlngbeen partially closed b the, operator to set up a predetermined di 'increase the eii'ect of the constant load on the stem 17. This tends to so/hold the master valve that the regulating valve remains vmore open than it otherwise would thereby vregulating valve therein, means actuated by buildin up the ressure in the outlet 3.

Suita le cut og valves 30 may be used to disconnect the increaser, vents 31 in the pipes 25 and 27 being likewise opened so that there is no impedance tothe motion of the diaphragm 24 occasioned by the iiuctuations of the master valve diaphragm 18.

As above stated the use of the Venturi and Pitot tube is'not necessary,l but is a convenient method of multiplying the eiect of the dili'erences in pressure on the diaphragm 24 against the action of the diaphragm 18 and takes the place of increasing the area of the diaphragm 24 which would make the apparatus very bulky.

Obviously, changes in details of construction may be made without departing from the spirit of the invention, and I do not limit myself to any particular form or arrange-l ment of parts.

-What I claim as my invention is 1. The combination with a conduit of regulating means for' automatically maintaining a 'constant pressure in the conduit on the outlet side of the regulator, means in pressure at a point in the outlet side o the conduit, and a reciprocable member that is operated by variations in the diiierence between the pressures on the opposite'sides of the point and is adapted when so o erated to coactwith the regulator to vary t e pressure in the outlet side of the conduit as the volume of How past said point varies.

2.l The combination with a conduit of regulating means for automatically maintaining a constant pressure in the conduit on the outlet side of the regulator, means for causing a local drop in pressure at a point in the outlet side of the conduit, a reciprocable member that is operatedl by variations in the difference", vbetween the pressures on the opposite'side's vof the point and is adapted when so operated to coact with the regulator to vary the pressure in the outlet side of the conduit as the volume of flow past said point varies, and means between the conduit and member for multiplying the effect of the differential pressure thereon.

3. The combination with a conduit of regulating means for automatically maintaining a constant pressurein the conduit on the outlet side .of the regulator, means for l causing a local drop in pressure at a point in the outlet side of the conduit, a reciprocable member that' is operated by variations in the d iiler'ence between-the pressures on the opposite sides of the point and is adapted when so operated to coact with. the regulator to 4vary the pressure in they outlet side of the conduit as the volume of flow past said point varies, and a Yenturi tubefor multiplying the eiiect of the dilierential pressure on themember.

4. The comblnation with a conduity of a conduit on the outlet side of the regulating` valve and is adapted to direct flowfrom the conduit on the inlet side of the regulating valve to theoperating means of the latter, to open the regulating valve when the pressure in the conduit on the outlet side falls and to close it when said pressure rises, means ior causing a local drop inpressure at a point in the conduit on the outlet side of the regulating valve, and means operated by variations in the diference between pressures on opposite sides of said point and adapted to so control the master Valve that the pressure in the outlet side of the conduit increases as the volume of flow past said point increases.

5. The combinatlon with a conduit of a regulating valve therein, means actuated by fluid under pressure and adapted to operate the regulating valve, a master valve that is operatedby variations in pressure in the conduit on the outlet side of the regulating valve and is ada ted to direct ow from the conduit on the inlet side of the regulating valve to the operating means of the latter, to open the regulating valve when the pressure in the conduit on the outlet side falls and to close' it when said pressure rises, means for causing a local drop in pressure at a point in the conduit on the outlet side of the regulating valve, means operated by variations in the difference between pressures on opposite sides of said point and adapted to so control the master valve that the pressure in the outlet side of the conduit increases as the volume of flow past said point lncreases, and means for multiplying 4the effect of the diiierential pressure on the variations in the difference between the presthe dii'erential pressure there upon the said sures 011 the opposite sidesrof the said point diaphragm. 10

-and adapted to coact withethe master valve In testimony whereof I aiix my' signature upon the regulating valve to open the latter in presence of two witnesses.

as the volume of flow past said point in ERNEST F. LLOYD. creases, and e Venturi tube operatively con-` Witnesses: nected to the conduit Where the local drop ANNA M. DORR,

occurs and adapted toaugment the effect of ANNA M. SHANNON. 

